Utility for recording time spent on a project

[Ronald L Chichester]

Does Gnucash have a facility for recording time slips (such as time 
spent on a project, which project, and what was done)?  Some 
professions (lawyers, accountants, software developers) often bill by 
time, rather than specific item and I was wondering if some software 
existed for generating those time entries and plugging them into 
Gnucash directly.

Ron